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/*
* aes_cbc.h
*
* Header for AES Cipher Blobk Chaining Mode.
*
* David A. McGrew
* Cisco Systems, Inc.
*
*/
/*
*
* Copyright (c) 2001-2006, Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* Neither the name of the Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef AES_CBC_H
#define AES_CBC_H
#include "aes.h"
#include "cipher.h"
typedef struct {
v128_t state; /* cipher chaining state */
v128_t previous; /* previous ciphertext block */
uint8_t key[32];
int key_len;
aes_expanded_key_t expanded_key; /* the cipher key */
} aes_cbc_ctx_t;
err_status_t
aes_cbc_set_key(aes_cbc_ctx_t *c,
const unsigned char *key);
err_status_t
aes_cbc_encrypt(aes_cbc_ctx_t *c,
unsigned char *buf,
unsigned int *bytes_in_data);
err_status_t
aes_cbc_context_init(aes_cbc_ctx_t *c, const uint8_t *key,
int key_len);
err_status_t
aes_cbc_set_iv(aes_cbc_ctx_t *c, void *iv, int direction);
err_status_t
aes_cbc_nist_encrypt(aes_cbc_ctx_t *c,
unsigned char *data,
unsigned int *bytes_in_data);
err_status_t
aes_cbc_nist_decrypt(aes_cbc_ctx_t *c,
unsigned char *data,
unsigned int *bytes_in_data);
#endif /* AES_CBC_H */
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